alist=['si','chuan','sheng','si','chuan','da','xue']
blist=['si','chuan','sheng','si','chuan','da','xue']
clist=['shi','chuan','sheng','si','chuan','da','xue']
dlist=['1','2','3','4','5','6','7']
alist=blist
blist=clist
len(alist)
elist=zip(blist,clist,dlist)
list(elist)
